Raymond Machinery Co.,Ltd engages in casting parts for more than 15 yeas, involves investment casting (precision casting) and sand casting. Investment is a versatile process that offers many advantages over other manufacturing processes. Today, a summary of whole process is made as following.
- Manufacturing wax injection tool
In order to manufacture a component using the casting process, a mold or matrix is required. This mold represents the contours of the cast component. Since the mold wax does not have an abrasive effect on the matrix, it has a very long service life. One-off or non-recurring work step.
- Wax model production
The future cast component and the sprue system are injected into mold wax. The injection pressure of the machine and the temperature of the mold wax must be precisely coordinated to ensure high dimensional accuracy and surface quality.
- Wax model assembly
In this work step, the wax models and the trunk are assembled to form a wax tree. Great care in assembling the wax trees by experienced employees ensures high quality of the cast part.
- Dipping, sanding and drying
By repeatedly dipping the wax tree in mold slip, then sanding and drying, a ceramic shell made up of several layers is created. The first layer, consisting of particularly fine-grained zirconium sand, gives our investment cast components a very high surface quality.
- Melting out
During the melting out process, the mold wax is melted out of the ceramic shell under pressure in a steam autoclave.
- Firing
During the firing of the ceramic molds, the last traces of mold wax are burned completely and without residue. Firing gives the ceramic shells the necessary strength.
- Casting
The customer-specific alloy components are melted in the induction furnace and the molten steel is then poured into the hot ceramic molds using a casting ladle. The precise temperature control ensures high material quality and surface quality even for thin-walled, complex components.
- Demolding
After the casting cluster has cooled, the ceramic shell is carefully removed.
- Separating
The cast component and the cast trunk are separated from each other.
- Blasting
In order to remove any remaining ceramic residues from the surface of the cast parts, they are subjected to a blasting process.
Depending on the customer’s requirements, the following then take place: sprue grinding, heat treatment, straightening process, mechanical processing and/or surface coating.
- Final inspection
Raymond Machinery Co.,Ltd carries out a visual inspection on 100% of all investment casting products. The entire scope of all quality control criteria and measures is coordinated in a functional manner according to the customer’s requirements.
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